using AutoMapper;
using BaseData.WriteApi.Appcontext.Command.Ram_Files;
using MediatR;
using SmartTracking.Domain.HQX;
using SmartTracking.ErrorCode;
using SmartTracking.Infrastructure.Interfaces;

namespace BaseData.WriteApi.Appcontext.CommandHandler.Ram_Files
{
    /// <summary>
    /// 种公档案更新命令处理器
    /// </summary>
    public class UpdateRamFileCommandHandler : IRequestHandler<UpdateRamFileCommand, ApiResult<bool>>
    {
        private readonly IBaseRepository<RamFile> _ramRepository;
        private readonly IMapper _mapper;
        private readonly ILogger<UpdateRamFileCommandHandler> _logger;

        public UpdateRamFileCommandHandler(
            IBaseRepository<RamFile> ramRepository,
            IMapper mapper,
            ILogger<UpdateRamFileCommandHandler> logger)
        {
            _ramRepository = ramRepository;
            _mapper = mapper;
            _logger = logger;
        }

        /// <summary>
        /// 处理种公档案更新命令
        /// </summary>
        /// <param name="request">种公档案更新命令</param>
        /// <param name="cancellationToken">取消令牌</param>
        /// <returns>更新结果</returns>
        public async Task<ApiResult<bool>> Handle(UpdateRamFileCommand request, CancellationToken cancellationToken)
        {
            try
            {
                // 验证请求参数
                if (request == null)
                {
                    _logger.LogWarning("种公档案更新请求参数为空");
                    return new ApiResult<bool> { Code = ApiEnum.更新失败, Message = "请求参数不能为空", data = false };
                }

                // 验证数据
                if (!request.Validate(out string errorMessage))
                {
                    _logger.LogWarning($"种公档案更新数据验证失败: {errorMessage}");
                    return new ApiResult<bool> { Code = ApiEnum.更新失败, Message = errorMessage, data = false };
                }

                // 根据ID查询种公档案
                var ramFile = await _ramRepository.GetByIdAsync(request.RamId);
                
                if (ramFile == null)
                {
                    _logger.LogWarning($"未找到ID为 {request.RamId} 的种公档案");
                    return new ApiResult<bool> { Code = ApiEnum.查询失败, Message = "未找到指定的种公档案", data = false };
                }

                // 检查是否已被删除
                if (ramFile.IsDeleted)
                {
                    _logger.LogWarning($"ID为 {request.RamId} 的种公档案已被删除");
                    return new ApiResult<bool> { Code = ApiEnum.查询失败, Message = "种公档案已被删除", data = false };
                }

                // 更新种公档案信息
                ramFile.EarSignal = request.EarSignal;
                ramFile.Variety = request.Variety;
                ramFile.ElectronicEarTag = request.ElectronicEarTag;
                ramFile.GeneRank = request.GeneRank;
                ramFile.FatherNumber = request.FatherNumber;
                ramFile.MotherNumber = request.MotherNumber;
                ramFile.DateofBirth = request.DateofBirth;
                ramFile.EntryDate = request.EntryDate;
                ramFile.PlaceOfBirth = request.PlaceOfBirth;
                ramFile.BirthWeight = request.BirthWeight;
                ramFile.Note = request.Note;
                
                // 执行更新
                var result = await _ramRepository.UpdateAsync(ramFile);
                
                if (result>0)
                {
                    _logger.LogInformation($"成功更新种公档案，ID: {request.RamId}");
                    return new ApiResult<bool> { Code = ApiEnum.更新成功, Message = "种公档案更新成功", data = true };
                }
                else
                {
                    _logger.LogError($"更新种公档案失败，ID: {request.RamId}");
                    return new ApiResult<bool> { Code = ApiEnum.更新失败, Message = "种公档案更新失败", data = false };
                }
            }
            catch (ArgumentException ex)
            {
                _logger.LogWarning($"参数验证异常: {ex.Message}");
                return new ApiResult<bool> { Code = ApiEnum.更新失败, Message = ex.Message, data = false };
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, $"更新种公档案时发生系统异常: {ex.Message}");
                return new ApiResult<bool> { Code = ApiEnum.更新失败, Message = "系统异常，请联系管理员", data = false };
            }
        }
    }
}